Linear motors:
The fastest CNC machines on the market
Wear-free and highly dynamic
Direct drives such as linear motors and torque motors generate the desired movements directly, without mechanical transmission elements. The drives therefore operate wear-free and without mechanical backlash. The acceleration of linear motors is particularly important. In SW machining centers, they achieve acceleration values of up to 2g and rapid traverse speeds of 120 m/min. And this is with maximum precision. This dynamic translates into shorter cycle times and higher productivity.
Non-productive time down, productivity up
In aluminum machining processes, non-productive times are often longer than the pure machining or main times. The larger the workpieces are, the longer the distances the feed axes have to cover, for example during a tool change. The rule of thumb is: the more complex the machining and the larger the workpieces, the greater the proportion of non-productive time. A linear motor as a drive achieves a higher speed than a motor with rotor and stator, whose rotary motion must be mechanically converted linearly. Furthermore, due to its operating principle, a linear motor works wear-free in every application.
We know these relationships and have been relying on the use of the linear motor for many years. With the help of the higher dynamics and speed of linear motors for straight-line movements in combination with the weight-optimized design, we minimize these non-productive times in our CNC machining centers compared to axes with servo motors. Simply put, SW’s CNC machining centers with linear motors are the fastest in the world.
Precision without mechanics
A linear motor ensures high force and positioning accuracy, even at the highest machining speeds, with a guaranteed deviation combined from the X/Y/Z axis of less than 0.006 mm. With a Kv factor of 10 and a jerk of 1,200 m/s³, the linear motor is particularly suitable for high-precision micro movements. The production of impellers for turbochargers or of medical implants are outstanding examples of the high-precision manufacturing of complex geometries with highly dynamic linear motors.
Learn more about our machining centers and broad product portfolio, or contact our Technology People directly with any questions.